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Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union
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Volume 6, issue 3
Earth Surf. Dynam., 6, 743–761, 2018
https://doi.org/10.5194/esurf-6-743-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Earth Surf. Dynam., 6, 743–761, 2018
https://doi.org/10.5194/esurf-6-743-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 04 Sep 2018

Research article | 04 Sep 2018

Clast imbrication in coarse-grained mountain streams and stratigraphic archives as indicator of deposition in upper flow regime conditions

Fritz Schlunegger and Philippos Garefalakis

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Cited articles

Allen, P. A., Earth Surface Processes, John Wiley and Sons, Oxford, 416 pp., 1997.
Alexander, J. and Fielding, C.: Gravel antidunes in the tropical Burdekin River, Queensland, Australia, Sedimentology, 44, 327–337, 1997.
Alexander, J., Bridge, J. S., Cheel, R. J., and Leclair, S. F.: Bedforms and associated sedimentary structures formed under supercritical water flows over aggrading sand beds, Sedimentology, 48, 133–152, 2001.
Andrews, E. D.: Bed-material entrainment and hydraulic geometry of gravel-bed rivers in Colorado, GSA Bull., 95, 371–378, 1984.
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Clast imbrication, which is a depositional fabric where clasts overlap each other similar to a run of toppled dominoes, is one of the most conspicuous sedimentary structures in coarse-grained fluvial deposits. However, the conditions leading to this fabric have been contested. Here, we calculate the hydrological conditions for various stream gradients. We find that clast imbrication most likely forms where channel gradients exceed a threshold and where upper flow regime conditions prevail.
Clast imbrication, which is a depositional fabric where clasts overlap each other similar to a...
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